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You searched for: subject:"energy conversion"
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[texts]A brief survey of direct energy conversion devices for possible space vehicle application - Premo, D. A.
No Abstract Available
Keywords: ENERGY CONVERSION; PHOTOELECTRIC MATERIALS; RADIANCE; SURVEYS
Downloads: 94
[texts]Concentrator structure for a solar energy photovoltaic conversion system final report - Klammer, A., Jr.
No Abstract Available
Keywords: CONCENTRATORS; PHOTOVOLTAIC CONVERSION; SOLAR ENERGY CONVERSION
Downloads: 123
[texts]DESIGN AND OPERATIONAL PERFORMANCE OF A 150-KILOWATT SODIUM FLASH-VAPORIZATION FACILITY - Goldman, L. J.
Design and operational performance of sodium flash vaporization facility
Keywords: ENERGY CONVERSION; VAPORIZATION; FLASH; PILOT PLANTS; SODIUM; VAPORIZING; ENERGY CONVERSION; FLASH; PILOT PLANT; SODIUM
Downloads: 87
[texts]Feasibility investigation of growing gallium arsenide single crystals in ribbon form - Richardson, D. L
Polycrystalline GaAs ribbons have been grown in graphite boats by passage of a wide zone through B2O3 encapsulated feed stock, confined by a quartz cover plate. By controlling the heat flow in the graphite boat and controlling the zoning rate, large grained, single phase polycrystalline samples with directional solidification and good thickness control were achieved. Arsenic vaporization was effectively suppressed at the melting point of GaAs by the B2O3 moat and 3 atmospheres of pressure...
Keywords: ENERGY CONVERSION EFFICIENCY; PHOTOVOLTAIC CELLS; SOLAR COLLECTORS; COMPUTER PROGRAMMING; SILICON; SOLAR ENERGY CONVERSION; THERMAL ABSORPTION
Downloads: 132
[texts]Reactively sputtered thin film photovoltaic devices - Hsieh, E. J
The feasibility of a reactively sputtered thin film CdS - Cu2S solar cell is proven. Identification of the reactively sputtered Cu2S film is made by X-ray diffractometer and spectro-transmission measurements. Because of its simplicity, economical use of material, and high yield, the reactive sputtering process promises to be a low cost method for producing CdS - Cu2S solar cells.
Keywords: ENERGY CONVERSION EFFICIENCY; PERFORMANCE TESTS; PHOTOVOLTAIC CELLS; ELECTROMAGNETIC ABSORPTION; RADIATION MEASUREMENT; SOLAR ENERGY CONVERSION
Downloads: 103
[texts]Applied research on 2-6 compound materials for heterojunction solar cells - Bube, R. H
Several II-VI heterojunctions show promise for photovoltaic conversion of solar energy. The three of greatest interest are p-CdTe/n-CdS, p-CdTe/n-ZnSe, and p-ZnTe/n-CdSe. Several p-CdTe/n-CdS heterojunction cells have been prepared by close spaced transport deposition of p-CdTe on single crystal n-CdS, and by two source vacuum evaporation of n-CdS on single crystal p-CdTe. Both types of cells, in an experimental stage, are quite comparable, exhibiting values of quantum efficiency between 0.5 and...
Keywords: MATHEMATICAL MODELS; PHOTOVOLTAIC CELLS; SILICON; SOLAR COLLECTORS; ENERGY CONVERSION EFFICIENCY; SOLAR ENERGY CONVERSION; STRUCTURAL DESIGN CRITERIA
Downloads: 129
[texts]Investigation of thin film solar cells based on Cu2S and ternary compounds such as CuInS2 - Loferski, J. J
Production and characterization in thin film form of Cu2S and related Cu compounds such as CuInS2 for photovoltaic cells are examined. The low cost process technology being reported, namely the sulfurization method, is capable of producing films on various substrates. Cathodoluminescence is being used as a diagnostic tool to identify Cu(x)S and CuInS2 compounds. Also, single crystals of CuInS2 are being prepared and it is contemplated that p-n junctions will be made in such crystals.
Keywords: PARABOLIC REFLECTORS; PHOTOVOLTAIC CELLS; SOLAR COLLECTORS; COST EFFECTIVENESS; ENERGY CONVERSION EFFICIENCY; SILICON; SOLAR ENERGY CONVERSION
Downloads: 268
[texts]POLAROGRAPHIC INVESTIGATION OF SLAGS, REPORT 2 - OGNYANIK, S. S
THE POLAROGRAMS OF THE OXIDES OF TIN, CERIUM, AND COPPER DISSOLVED IN DILUTE SODIUM BOROSILICATE ARE GIVEN. IT WAS ESTABLISHED THAT THERE IS A LINEAR DEPENDENCE BETWEEN THE DIFFUSION CURRENT AND THE CONCENTRATION OF THE OXIDE IN THE MELT.
Keywords: ELECTRIC CELLS; OXIDATION; REDUCTION (CHEMISTRY); ELECTRODES; ENERGY CONVERSION; PUMPS; WATER
Downloads: 79
[texts]The losses in the process of converting the energy of coal into steam - Peebles, Thomas Armstrong
Thesis (M.E.)--University of Illinois, 1913
Keywords: Coal; Combined cycle power plants; Energy conversion; Steam; Theses
Downloads: 18
[texts]WEIGHTLESSNESS, MEDICAL AND BIOLOGICAL RESEARCH - NON
PHYSIOLOGICAL ASPECTS OF MANNED SPACE FLIGHT ARE DISCUSSED WITH EMPHASIS ON WEIGHTLESSNESS AS THE PRIMARY UNFAVORABLE FACTOR.
Keywords: DIRECT POWER GENERATORS; ENERGY CONVERSION; ELECTRONIC EQUIPMENT; POWER EFFICIENCY
Downloads: 252
[texts]Montana renewable energy handbook (Volume 1977) - Cochran, Kye
Bibliography: p. 22-30
Keywords: Direct energy conversion; Electric power production; Power resources; Energy consumption
Downloads: 721
[texts]Frequency dependence of sound transmitted from an airborne source into the ocean - Medwin, Herman, 1920-;Helbig, R. A.
Cover title
Keywords: ION FLOW DYNAMICS; ELECTROHYDRODYNAMICS; TURBULENCE; DIRECT ENERGY CONVERSION
Downloads: 46
[texts]STUDY OF A NUCLEAR ELECTRIC GENERATOR FOR SPACE - NON
NUCLEAR ELECTRIC GENERATOR FOR SUPPLYING POWER TO SPACE VEHICLES
Keywords: ELECTRIC GENERATORS; ENERGY CONVERSION; NUCLEAR ELECTRIC POWER GENERATION; SPACECRAFT POWER SUPPLIES; ENERGY CONVERSION; GENERATOR; NUCLEAR POWER CONVERSION; SPACECRAFT POWER SUPPLY
Downloads: 100
[texts]Multi-Sensor Data Fusion Experiment: Preliminary Report on Processing, Analysis, and Data Fusion Approach - Meyer, Dave
Goals: 1) Study the use of multiple sensors to identify surface materials for chemical hazards assessment; 2) Develop tools required to prepare multi-source imagery for use in chemical hazards assesment: a) Characterization of individual image sources. b) Data preparation. c) Analysis. 3) Example application at government test site. Automated Fusion of Image Data Systems (AFIDS) was developed at JPL to co-register multi-source imagery It handles a variety of sensors, projections, resampling meth...
Keywords: CATALYSTS; JET ENGINE FUELS; SOLID OXIDE FUEL CELLS; ENERGY CONVERSION; FUEL CELL POWER PLANTS; ENERGY CONVERSION EFFICIENCY
Downloads: 151
[texts]Simulation of nap-of-the-Earth flight in helicopters - Condon, Gregory W
NASA-Ames along with the U.S. Army has conducted extensive simulation studies of rotorcraft in the nap-of-the-Earth (NOE) environment and has developed facility capabilities specifically designed for this flight regime. The experience gained to date in applying these facilities to the NOE flight regime are reported along with the results of specific experimental studies conducted to understand the influence of both motion and visual scene on the fidelity of NOE simulation...
Keywords: COST ANALYSIS; SOLAR ENERGY CONVERSION; CRITERIA; ENERGY CONVERSION EFFICIENCY; PHOTOVOLTAIC CONVERSION; DOCUMENTS; PERFORMANCE TESTS; RELIABILITY; SAFETY; SITE SELECTION
Downloads: 122
[texts]Modis-N airborne simulator - Cech, Steven D
All required work associated with the above referenced contract has been successfully completed at this time. The Modis-N Airborne Simulator has been developed from existing AB184 Wildfire spectrometer parts as well as new detector arrays, optical components, and associated mechanical and electrical hardware. The various instrument components have been integrated into an operational system which has undergone extensive laboratory calibration and testing...
Keywords: BETA PARTICLES; RADIOACTIVE ISOTOPES; RADIOISOTOPE BATTERIES; ENERGY CONVERSION; ENERGY CONVERSION EFFICIENCY; ENERGY GAPS (SOLID STATE); SEMICONDUCTOR DEVICES; SEMICONDUCTOR JUNCTIONS; ELECTRIC BATTERIES; NICKEL ISOTOPES; PROMETHIUM ISOTOPES
Downloads: 92
[texts]Device for converting the ionizing energy, emerging from a nuclear reactor, into electricity (sur un dispositif de conversion, en electricite, de l'energie ionisante issue d'un reacteur nucleaire) - Klein, S.
Device for conversion of ionizing energy from nuclear reactor into electricity
Keywords: ELECTRIC GENERATORS; ELECTRICITY; ENERGY CONVERSION; NUCLEAR ELECTRIC POWER GENERATION; NUCLEAR REACTORS; ELECTRIC POWER CONVERSION; ELECTRICITY; ENERGY CONVERSION; NUCLEAR-ELECTRIC POWER SUPPLY
Downloads: 73
[texts])research in the conversion of various forms of energy by unconventional techniques) status report, jun. 1964 - Bockris, J. O
Methods for energy conversion in biochemical fuel cells, plasma physics, and thermal energy storage
Keywords: BIOCHEMICAL FUEL CELLS; PLASMA PHYSICS; THERMAL ENERGY STORAGE; BIOCHEMISTRY; ENERGY CONVERSION; HEAT STORAGE; LACTATES; PLASMA PHYSICS; PYRUVATES; BIOCHEMICAL FUEL CELL; ENERGY CONVERSION
Downloads: 127
[texts]Natural vibrations as cause of energy fluctuations and chemical conversions - Polanyi, M.
Natural vibrations as energy fluctuation and chemical conversion mechanism in monomolecular reactions
Keywords: CHEMICAL REACTIONS; FREE VIBRATION; MOLECULAR ENERGY; ENERGY CONVERSION; FREE VIBRATION; MOLECULAR ENERGY LEVELS; REACTION KINETICS; VARIATIONS; VIBRATION; CHEMICAL REACTION; ENERGY CONVERSION
Downloads: 91
[texts]Measuring dynamic oil film coefficients of sliding bearing - Feng, G.
A method is presented for determining the dynamic coefficients of bearing oil film. By varying the support stiffness and damping, eight dynamic coefficients of the bearing were determined. Simple and easy to apply, the method can be used in solving practical machine problems.
Keywords: CONFERENCES; MINORITY CARRIERS; MODULES; WEBS (SHEETS); ENERGY CONVERSION; ENERGY CONVERSION EFFICIENCY; PRODUCTION ENGINEERING; RELIABILITY ENGINEERING; SOLAR ARRAYS; CRYSTAL GROWTH; LASER APPLICATIONS; MATHEMATICAL MODELS
Downloads: 86
[texts]Bivariate normal, conditional and rectangular probabilities: A computer program with applications - Swaroop, R.
Some results for the bivariate normal distribution analysis are presented. Computer programs for conditional normal probabilities, marginal probabilities, as well as joint probabilities for rectangular regions are given: routines for computing fractile points and distribution functions are also presented. Some examples from a closed circuit television experiment are included.
Keywords: DESIGN ANALYSIS; SOLAR COLLECTORS; SOLAR RADIATION; SPECIFIC HEAT; ELECTRIC POWER PLANTS; PERFORMANCE PREDICTION; SENSITIVITY; SOLAR ENERGY CONVERSION; THERMAL ENERGY; ENERGY CONVERSION EFFICIENCY; MATHEMATICAL MODELS; PARAMETER IDENTIFICATION
Downloads: 135
[texts]Lumped mass modelling for the dynamic analysis of aircraft structures - Abu-Saba, Elias G.
Aircraft structures may be modelled by lumping the masses at particular strategic points and the flexibility or stiffness of the structure is obtained with reference to these points. Equivalent moments of inertia for the section at these positions are determined. The lumped masses are calculated based on the assumption that each point will represent the mass spread on one half of the space on each side...
Keywords: ENERGY CONVERSION EFFICIENCY; SATELLITE POWER TRANSMISSION; FABRICATION; MOLECULAR BEAM EPITAXY; P-N JUNCTIONS; SEMICONDUCTOR LASERS; SOLAR ENERGY CONVERSION; CONNECTORS; ELECTRON BEAMS; LASER POWER BEAMING
Downloads: 239
[movies]SEBS Energy Panel - Carbon Sequestration and Waste to Energy Conversion (Spring 2007) - Da Quan Rong
Energy Panel on Carbon Sequestration and Waste to Energy Conversion. Hosted by Columbia University's Scientists and Engineers for a Better Society during the Spring of 2007.
Keywords: Energy Panel; Carbon Sequestration; Waste to Energy Conversion; SEBS; Columbia University
Downloads: 59
[texts]Exploiting structure: Introduction and motivation - Xu, Zhong Lin
Research activities performed during the period of 29 June 1993 through 31 Aug. 1993 are summarized. The Robust Stability of Systems where transfer function or characteristic polynomial are multilinear affine functions of parameters of interest in two directions, Algorithmic and Theoretical, was developed. In the algorithmic direction, a new approach that reduces the computational burden of checking the robust stability of the system with multilinear uncertainty is found...
Keywords: ENERGY CONVERSION EFFICIENCY; SILICON FILMS; SOLAR CELLS; TECHNOLOGY ASSESSMENT; PHOTOVOLTAIC CONVERSION; RADIATION TOLERANCE; THIN FILMS
Downloads: 82
[texts]Energy conversion - Chang, Sheldon S. L

Keywords: Direct energy conversion; Conversao Direta E Armazenamento De Energia; Engenharia Mecanica; Énergie
Downloads: 21
[texts]IMPORTANCE AND PROGRESS OF WIND POWER UTILIZATION IN DENMARK - STEIN, D
THE DESIGNS OF VARIOUS WIND POWER PLANTS IN DENMARK ARE DISCUSSED. PRICE LISTS FOR THE PLANTS ARE GIVEN ALONG WITH PRICES FOR DIRECT CURRENT GENERATORS FOR WIND POWER PLANTS.
Keywords: ELECTRIC POWER; WINDMILLS (WINDPOWERED MACHINES); WINDPOWERED GENERATORS; ENERGY CONVERSION; ENERGY SOURCES; METEOROLOGICAL PARAMETERS; SYSTEMS ANALYSIS
Downloads: 87
[texts]Analysis of In-Space Assembly of Modular Systems - Moses, Robert W.
Early system-level life cycle assessments facilitate cost effective optimization of system architectures to enable implementation of both modularity and in-space assembly, two key Exploration Systems Research & Technology (ESR&T) Strategic Challenges. Experiences with the International Space Station (ISS) demonstrate that the absence of this rigorous analysis can result in increased cost and operational risk...
Keywords: RADIOISOTOPE HEAT SOURCES; THERMOPHOTOVOLTAIC CONVERSION; ENERGY CONVERSION; OPTICAL FILTERS; TECHNOLOGY UTILIZATION; SPECTRA; EMITTERS
Downloads: 67
[texts]Minimum-fuel turning climbout and descent guidance of transport jets - Neuman, F.
The complete flightpath optimization problem for minimum fuel consumption from takeoff to landing including the initial and final turns from and to the runway heading is solved. However, only the initial and final segments which contain the turns are treated, since the straight-line climbout, cruise, and descent problems have already been solved. The paths are derived by generating fields of extremals, using the necessary conditions of optimal control together with singular arcs and state constr...
Keywords: HEAT TRANSMISSION; PHOTOVOLTAIC CELLS; SOLAR CELLS; ENERGY CONVERSION EFFICIENCY; GROOVES; LIGHT TRANSMISSION; TRANSPARENCE
Downloads: 109
[texts]The Supercritical Pile Model for GRBs - Kazanas, D
We present the spectral and temporal radiative signatures expected within the ''Supercritical Pile'' model of Gamma Ray Bursts (GRB). This model is motivated by the need for a process that provides the dissipation necessary in GRB and presents a well defined scheme for converting the energy stored in the relativistic protons of the Relativistic Blast Waves (RBW) associated with GRB into radiation; at the same time it leads to spectra which exhibit a peak in the burst nuF(sub nu) distribution at ...
Keywords: AIRSHIPS; HIGH ALTITUDE; ENERGY CONVERSION EFFICIENCY; THERMOELECTRIC GENERATORS; THERMOELECTRIC MATERIALS; PHOTOVOLTAIC CELLS; MODULES; ESTIMATING
Downloads: 112
[texts]Dependence of the starting characteristics of an electronic cyclotron generator on the distribution of the high frequency field in the direction of particle drift - Koshevaya, S. V.
Starting characteristics of cyclotron generator with high frequency field in direction of particle drift
Keywords: CYCLOTRONS; GYROFREQUENCY; HARMONICS; CYCLOTRON FREQUENCY; ELECTRON BEAMS; ENERGY CONVERSION EFFICIENCY; RESONATORS
Downloads: 54
[texts]AIR POWER PLANTS IN RUSSIA AND THE UNITED STATES (FROM DIMITRY STEIN, ELEKTRIZITAETSWIRTSCH., VOLUME 40, NO. 16, 1941) - NON
VARIOUS TYPES OF WIND POWER PLANTS IN THE USSR AND IN THE USA ARE DISCUSSED. THE VIME D-12 IN CRIMEA, A LARGE POWER PLANT, IS DESCRIBED. USES MENTIONED FOR THE USA ARE RUNNING FARM MACHINERY, PROTECTING PIPES FROM CORROSION DUE TO LEAKAGE CURRENTS, AND SUPPLYING POWER TO AMPLIFIERS FOR TELEPHONE WIRES.
Keywords: ELECTRIC POWER PLANTS; WINDPOWER UTILIZATION; WINDPOWERED GENERATORS; DENMARK; ELECTRIC POWER SUPPLIES; ENERGY CONVERSION EFFICIENCY; ENERGY SOURCES
Downloads: 88
[texts]Epitaxial technology for low cost solar cells - Kressel, H.
Epitaxial solar cell structures on low cost silicon substrates are compared to direct diffusion substrates. Dislocation density in the epitaxial layers is found to be significantly lower than that of the substrate material. The saturation current density of diodes epitaxially formed on the substrate is commonly 2 to 3 orders of magnitude lower than for diodes formed by direct diffusion. Solar cells made epitaxially are substantially better than those made by direct diffusion into similar materia...
Keywords: PHOTOVOLTAIC CELLS; SOLAR ENERGY CONVERSION; SYSTEMS ANALYSIS; COST ESTIMATES; ELECTRIC POWER SUPPLIES
Downloads: 91
[texts]Advanced supersonic propulsion system technology study, phase 2 - Allan, R. D
Variable cycle engines were identified, based on the mixed-flow low-bypass-ratio augmented turbofan cycle, which has shown excellent range capability in the AST airplane. The best mixed-flow augmented turbofan engine was selected based on range in the AST Baseline Airplane. Selected variable cycle engine features were added to this best conventional baseline engine, and the Dual-Cycle VCE and Double-Bypass VCE were defined...
Keywords: CRYSTAL DEFECTS; MANUFACTURING; SOLAR CELLS; DOPED CRYSTALS; ENERGY CONVERSION EFFICIENCY; IMPURITIES; PHOTOVOLTAIC EFFECT
Downloads: 212
[texts]Fuel-Air Mixing and Combustion in Scramjets - Drummond, J. P.
Activities in the area of scramjet fuel-air mixing and combustion associated with the Research and Technology Organization Working Group on Technologies for Propelled Hypersonic Flight are described. Work discussed in this paper has centered on the design of two basic experiments for studying the mixing and combustion of fuel and air in a scramjet. Simulations were conducted to aid in the design of these experiments...
Keywords: ENERGY CONVERSION; MELTING POINTS; HIGH TEMPERATURE; THERMIONIC POWER GENERATION; PROSTHETIC DEVICES; ORGANIZATIONS; IMPLANTATION; METALS; CHEMICAL ENERGY
Downloads: 188
[texts]PARALLEL OPERATION OF A SYNCHRONOUS GENERATOR AND AN INFINITELY HIGH-POWERED NETWORK WHEN DRIVEN BY A HONNEF-GROSS WIND TURBINE - LINNER, L
AN INFINITE HIGH POWERED NETWORK IS DESCRIBED AS A NETWORK WHOSE VOLTAGE IS INDEPENDENT OF THE LOAD STATES OF THE CONNECTED MACHINES, AND WHOSE VOLTAGE AMPLITUDE AND ANGULAR VELOCITY IS ALWAYS THE SAME. THE THREE-PHASE GENERATOR OPERATING IN CONJUNCTION WITH THIS NETWORK MUST OPERATE AT A CONSTANT ROTATION RATE, AS MUST THE WIND WHEEL ACCORDING TO THE NUMBER OF ITS POLES AND THE FREQUENCY OF THE NETWORK...
Keywords: SYSTEMS ANALYSIS; WINDPOWERED GENERATORS; COST EFFECTIVENESS; ELECTRIC POWER PLANTS; ENERGY CONVERSION EFFICIENCY; METEOROLOGICAL PARAMETERS; NUMERICAL ANALYSIS
Downloads: 235
[texts]SPACE CYBERNETICS - NON
THE SIXTH INTERNATIONAL SYMPOSIUM OF THE INTERNATIONAL FEDERATION ON AUTOMATIC CONTROL (IFAK) IN TSAKHKADZOR IS DISCUSSED. MORE THAN 300 SCIENTISTS FROM 16 COUNTRIES DISCUSSED FOR SIX DAYS THE PRESSING PROBLEMS OF SPACE CYBERNETICS AND RELATED TRENDS IN SCIENCE AND TECHNOLOGY, AND INDICATED THE AREAS OF AND PROSPECTS FOR INTERNATIONAL COOPERATION IN THIS DIRECTION.
Keywords: EARTH RESOURCES; SOLAR ENERGY; TECHNOLOGY ASSESSMENT; ENERGY CONVERSION EFFICIENCY; ENTROPY; FUEL CELLS; QUANTUM THEORY
Downloads: 77
[texts]GASP- General Aviation Synthesis Program. Volume 4: Propulsion. Part 1: Theoretical development - Hague, D
Propulsion system performance is computed during engine sizing and whenver aircraft performance is computed. The propulsion model user's and programmer's manual is presented. Routines are provided for jet and propeller driven aircraft.
Keywords: RECTENNAS; SOLAR POWER SATELLITES; TECHNOLOGY ASSESSMENT; CONTINUOUS RADIATION; ENERGY CONVERSION; MICROWAVE TRANSMISSION; SATELLITE POWER TRANSMISSION
Downloads: 292
[texts]CdS thin film solar cells for terrestrial power - Shirland, F. A
The development of very low cost long lived Cu2S/CdS thin film solar cells for large scale energy conversion is reported. Excellent evaporated metal grid patterns were obtained using a specially designed aperture mask. Vacuum evaporated gold and copper grids of 50 lines per inch and 1 micron thickness were adequate electrically for the fine mesh contacting grid. Real time roof top sunlight exposure tests of encapsulated CdS cells showed no loss in output after 5 months...
Keywords: PHOTOVOLTAIC CELLS; RESEARCH AND DEVELOPMENT; RESEARCH MANAGEMENT; LOW COST; PERFORMANCE TESTS; SOLAR CELLS; SOLAR ENERGY CONVERSION
Downloads: 135
[texts]Participation in the definition, conduct, and analysis of particle accelerator experiments for the first Spacelab Mission - Burch, J. L
The Space Experiments with Particle Accelerators (SEPAC) is a joint endeavor between NASA and the Institute of Space and Aeronautical Sciences (ISAS) in Japan. Its objectives are to use energetic electron beams to investigate beam-atmosphere interactions and beam-plasma interactions in the earth's upper atmosphere and ionosphere using the shuttle Spacelab. Two flights of SEPAC have occurred to date (Spacelab 1 on STS-9 in Nov.-Dec...
Keywords: AMBIENT TEMPERATURE; ELECTROLYTIC CELLS; FUEL CELLS; CATALYSTS; ELECTRODES; ENERGY CONVERSION EFFICIENCY; FLUOROPOLYMERS; PLATINUM; THERMAL STABILITY
Downloads: 85
[texts]A 4-kilowatt steam rankine cycle solar power system - Johnsen, R. L
Steam rankine cycle solar power system
Keywords: RANKINE CYCLE; SOLAR ENERGY CONVERSION; STEAM; RANKINE CYCLE; SOLAR POWER SYSTEM
Downloads: 191
[texts]Magnetohydrodynamic Power Generation in the Laboratory Simulated Martian Entry Plasma - Vuskovic, L.
This paper addresses the magnetohydrodynamic (MHD) conversion of the energy released during the planetary entry phase of an interplanetary vehicle trajectory. The effect of MHD conversion is multi-fold. It reduces and redirects heat transferred to the vehicle, and regenerates the dissipated energy in reusable and transportable form. A vehicle on an interplanetary mission carries about 10,000 kWh of kinetic energy per ton of its mass...
Keywords: SPACE POWER REACTORS; ENERGY CONVERSION; ALGORITHMS; LUNAR BASES; AUTONOMY; SPACE EXPLORATION
Downloads: 136
[texts]Ion heating and containment in the NASA Lewis bumpy torus plasma - Roth, J. R
Experimental observations have been made during steady state operation of a torus experiment at input powers up to 150 kilowatts in deuterium and helium gas. The steady state ion heating method utilizes a modified Penning discharge operated in a bumpy torus confinement geometry. The bumpy torus plasma is acted upon by a combination of strong electric and magnetic fields. In a deuterium plasma, electron temperatures from 14 to 140 electron volts and ion kinetic temperatures from 160 to 1785 elect...
Keywords: ENERGY SOURCES; ENERGY TECHNOLOGY; SOLAR ENERGY CONVERSION; SOLAR COLLECTORS; SYSTEMS ENGINEERING; TECHNOLOGY UTILIZATION
Downloads: 97
[texts]X-ray photoelectron spectroscopy interface studies - NON
No Abstract Available
Keywords: CONCENTRATORS; SOLAR COLLECTORS; SOLAR THERMAL ELECTRIC POWER PLANTS; CALORIMETERS; ENERGY CONVERSION; MICROPROCESSORS; RADIOMETERS; SIGNAL PROCESSING
Downloads: 128
[texts]Exploratory study on microanalysis of thin films by backscattering techniques - Mayer, J. W.
Solid phase epitaxial growth of Si layers was studied by backscattering spectrometry for controllable electrical characteristics. Samples were fabricated by vacuum deposition on a thin layer of Sb before deposition of the amorphous Si layer. Analysis of the resulting SPEG layer showed that Sb was present in the SPEG layer of Si. The characteristic of the SPEG layer against the Si substrate was rectifying...
Keywords: ENERGY CONVERSION EFFICIENCY; SILICON JUNCTIONS; SOLAR CELLS; THIN FILMS; GRAPHITE; PRODUCTION ENGINEERING; SEMICONDUCTING FILMS; SUBSTRATES
Downloads: 109
[texts]7
 In this project work, a three phase single stage three level Converter isimplemented for a wind energy conversion system. The proposed system is designed for athree phase wind driven Self-Excited Induction Generator (SEIG). The SEIG output isrectified with zero-dead band condition and the output of the converter is continuous. Thethree level converter is designed and the performance characteristics are studied...
Keywords: Three Level Converter; Self-Excited Induction Generator (SEIG); Wind Energy Conversion System (WECS); Zero Dead Band
Downloads: 15
[texts]Advanced GPS Technology For Automated/Autonomous Shuttle Missions - Goodman, John L
Test flights of a GPS receiver to replace TACAN began in 1996. Each orbiter has one GPS receiver. After RTF, ramp-up to single string GPS use will commence. Endeavour is undergoing TACAN removal and upgrade to three string GPS. GPS is not used for ascent and is powered on prelaunch to support an emergency landing. GPS has limited use for orbital operations and is not used for Rendezvous and docking...
Keywords: MAGNETIC MATERIALS; ENERGY TECHNOLOGY; ENERGY CONVERSION; DIELECTRICS; SPACECRAFT POWER SUPPLIES; SEMICONDUCTOR DIODES; CAPACITORS; TRANSFORMERS; SILICON CARBIDES
Downloads: 102
[texts]Mirror fusion propulsion system: A performance comparison with alternate propulsion systems for the manned Mars Mission - Schulze, Norman R.
The performance characteristics of several propulsion technologies applied to piloted Mars missions are compared. The characteristics that are compared are Initial Mass in Low Earth Orbit (IMLEO), mission flexibility, and flight times. The propulsion systems being compared are both demonstrated and envisioned: Chemical (or Cryogenic), Nuclear Thermal Rocket (NTR) solid core, NTR gas core, Nuclear Electric Propulsion (NEP), and a mirror fusion space propulsion system...
Keywords: AMORPHOUS SILICON; ENERGY CONVERSION EFFICIENCY; SOLAR CELLS; SPACECRAFT POWER SUPPLIES; COST REDUCTION; MARS BASES; MODULES; POLYIMIDES
Downloads: 185
[texts]INTRACYTOPLASMIC ULTRASTRUCTURES IN PERIPHERAL BLOOD CELLS IN LUPUS ERYTHEMATOSUS - METZ, G.
BUFFY COATS OF PERIPHERAL BLOOD OF DIFFERENT MANIFESTATIONS OF LUPUS ERYTHEMATOSUS WERE STUDIED BY ELECTRON MICROSCOPY FOR THE EXISTENCE OF VIRUSLIKE INTRACYTOPLASMIC TUBULAR STRUCTURES. THEY COULD ALWAYS BE DEMONSTRATED IN THE BLOOD LEUKOCYTES OF SYSTEMIC LUPUS ERYTHEMATOSUS INDEPENDENT OF DURATION, SEVERITY AND PRIOR MEDICAL TREATMENT OF THE DISEASE, BUT WERE COMPLETELY ABSENT IN CHRONIC DISCOID LUPUS ERYTHEMATOSUS...
Keywords: CARBON DIOXIDE; HEAT; MARS (PLANET); PHOTODISSOCIATION; PLANETARY ATMOSPHERES; VENUS (PLANET); ENERGY CONVERSION; PHOTONS; THERMOSPHERE
Downloads: 102
[texts]Inventory of forest and rangeland and detection of forest stress - Heller, R. C.
There are no author-identified significant results in this report.
Keywords: ENERGY CONVERSION; ENERGY REQUIREMENTS; WINDPOWERED GENERATORS; ECONOMIC FACTORS; FEASIBILITY ANALYSIS; HYDRAULIC EQUIPMENT; WINDPOWER UTILIZATION
Downloads: 77
[texts]Low cost AMOS solar cell development - Stirn, R. J
Recent developments at JPL have demonstrated that high conversion efficiencies are found with GaAs metal semiconductor solar cells when a particular heat treatment processing step is used to introduce an interfacial layer between the metal and the semiconductor. The new cell, called AMOS (Antireflection-Coated Metal-Oxide-Semiconductor), has open circuit voltages of 0.68-0.72 volts and efficiencies of 15% under terrestrial sunlight, as compared to values of 0.45-0.48 volts and 10%, respectively,...
Keywords: GLASS; SILICON JUNCTIONS; SOLAR CELLS; ENERGY CONVERSION EFFICIENCY; PHOTOVOLTAIC CELLS; POLYCRYSTALS; SINGLE CRYSTALS
Downloads: 147
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